High-speed hammer

ABSTRACT

A high-speed hammer wherein the working tools secured, respectively, on the anvil block and crosshead of a frame perform a working stroke being acted upon by a power unit mounted on the frame, and are returned to the initial position by compressed gas contained in a space in the anvil block. Said space accommodates a piston whose rod is adjustably connected with a bed for adjusting the position of the frame relative to said bed.

United States Patent n91 Kononenko et a1.

[ HIGH-SPEED HAMMER [76] Inventors: Vadim Grigorievich Kononenko,

ulitsa Chkalova, l5, kv. 12; Sergei Grigorievich Kushnarenko, ulitsaChkalova, 13, kv. 7; Vyacheslav Viktorovich Kollerov, prospekt Gagarina,38, kv. 60; Vyacheslav Dmitrievich Guly, ulitsa Sapemaya, 12a, kv. 2;Viktor Alexlevish Stelamakh, ulitsa Kirova, 18, kv. 2, all of Kharkov;Mikhail Nikitovich Fedotov, ulitsa Chaikovskogyo, 10, kv. l; NikolaiNikiforovieh Lysov, ulitsa Pushkina, 50, both of S tupino Moskovskoioblasti, all of USSR.

[22] Filed: Aug. 1, 1972 21 App]. No.: 277,039

[52] US. Cl. 72/453, 72/407 [51] Int. Cl B2lj 9/18 [58] Field'of Search72/407, 453; I 100/264, 269

v [4 1 Dec. 4, 1973 [56] References Cited UNITED STATES PATENTS3,623,352 11/1971 Kramer 72/453 3,507,143 4/1970 Georg 72/453 3,422,6581/1969 Michelson 72/407 3,135,140 6/1964 Ottestad et al. 72/4532,914,971 12/1959 Kendall et al 72/407 2,863,343 12/1958 Stenfort 72/407Primary ExaminerCharles W. Lanham Assistant Examiner-James R. DuzanAttorney-Eric H. Waters et al.-

57 ABSTRACT A high-speed hammer wherein the working tools secured,respectively, on the anvil block and crosshead of a frame perform aworking stroke being acted upon by a power unit mounted on the frame,and are returned to the initial position by compressed gas contained ina space in the anvil block.

Said space accommodates a piston whose rod is adjustably connected witha bed for adjusting the position of the frame relative to said bed.

1 Claim, 2 Drawing Figures PATENTED DEC 4 I975 SHEET 2 BF 2 HIGH-SPEEDHAMMER The present invention relates to working of metals by pressureand more specifically it relates to high-speed hammers.

Known in the art are high-speed hammers comprising a bed with amovably-installed frame carrying a power tions by said power unit, saidworking tools secured, respectively, on the crosshead and anvil block ofthe frame.

This hammber comprises a device forretuming the frame to the initialposition and holding it there.

This device consists of power cylinders for lifting the frame to theinitial position and a collet chuck for holding it in theupperposition,said chuck being located in the anvil block and controlled by a knockoutin the course of its movement (see, for example, Author's CertificateNo. 196,522,.Cl. 49.1).

In this hammer the position of the frame relative to the bed and,consequently, the position of its working zone is not adjusted forheight which is sometimes necessary when the hammer is used as acomponent of a stamping line.

An object of the present invention is hammer wherein the position of itsworking zone could be changed to enable said hammer to be used as acomponent mechanism of a stamping line.

In accordance with this object we hereby provide a high-speed hammercomprising a frame movably installed on a bed, said frame carrying apower unit, and working tools actuated by said power unit for making aworking stroke, said tools being secured, respectively, on the crossheadand anvil block of the frame, and a device for returning the frame tothe initial position and holding it there wherein, according to theinvention,

to provide a.

. unit, and working tools moved in the opposite direcsaid device is madein the form of a space located in the anvil block, filled withhigh-pressure gas and accommodating a piston whoserod is adjustablyconnected by a screw joint with the bed for adjusting the position ofthe frame for height with relation to the bed.

The high-speed hammer according to the present invention can be used ina stamping line because its design allows its working zone to beadjusted for height.

Now the invention will be described in detail by way of example withreference to the accompanying drawings in which: i 7

FIG. 1 is a general viewof the high-speed hammer according to theinvention, partly cut away;

FIG. 2 is a section taken along line II-II in FIG. 1.

The high-speed hammer comprises a bed 1 (FIGS. 1,.

2) with guides 2 rigidly secured on it. Said guides are fastened to thebed 1 with the aid of wedges 3 which allow adjusting the position ofsaid guides 2.

A frame 6 is secured on the bed 1 by means of a rod 4 (FIG. 1) providedwith a piston 5 at the end. The.

frame 6 is formed by cylindrical stepped uprights 7 which carry an anvilblock 8 on the top and a guide cylinder 9 at the bottom, said cylinderaccommodating a crosshead 10 which is capable of vertical motion.Installed on the frame 6 under the .guide cylinder 9 is a power unitl'l.'

The ends of the uprights 7 are threaded to receive the nuts 12 whichhold together all the above-mentioned elements of the frame.

The anvil block 8 and the crosshead 10 carry, respectively, the workingtools 13 and 14 which are constituted in this example by dies. The anvilblock 8 consists of an upper plate 15, lower plate 16 and intermediateplates 17. The die 14 is fastened to the lower plate 16 while the upperplate 15 has a space 18 filled with highpressure gas and accommodatingthe piston'S with the rod 4. The upper threaded end of the rod 4 passesthrough a hole in the upper plate 19 of the bed 1, being secured to itby a nut 20 and a lock nut2l. This method of rod fastening allows theposition of the frame to be changed with relation to the bed 1 when thehammer is used in a production line.

The rod 4has a channel 22 through which highpressure gas is deliveredfrom a receiver (not shown in the drawing) into the space 18 for holdingthe frame in the topmostposition.

The plates 17 and 16 have holes forming a through channel 23 used forthe passage of a knockout 24 which has a piston 25 at the end, locatedin the space The power unit 11 has a combustion chamber32 for buming.the gas-air mixture, a valve 33 and a channel 34 extending from thepower unit 11 to the crosshead 10 the latter moving vertically in theguide cylinder 9.

The high-speed hammer operates as follows. The drawing illustrates thehammer in the initial position. The space 18 is filled with air throughthe channel 22 in the rod 4under a pressure required for holding apreset value, the valve 33 operates. The channel 34 the combustionchamber is put in communication with 32.

The pressure of the expanding gases is applied tothe lower face of thecrosshead 10 and to the bottom of the combustion chamber 32 of the powerunit 11.

The crosshead 10 together with the working tool 14 moves at ahigh speedupward in the guide cylinder9 and in the guides 2.

The pressure acting on the bottom of the combustion chamber 32 pushesdown the power unit 1 1 and, consequently, the anvil block 8 togetherwith the working tool 13.

The pressure of the expanding gases is converted into the kinetic energyof the working tools 13 and 14 which working tool 14 secured to thecrosshead loretums together with the crosshead 10 id the initialposition under its own weight.

The stamped work is discharged by the knockout 24 for which purpose thehydraulic liquidflows from the connected to each other; working toolssecured, respectively, on said anvil block and crosshead; a power unitmounted on said frame and intended to move said working tools towardseach other during the working stroke; a space in said anvil block filledwith highpressure gas for returning the frame to the initial positionafter the working stroke; a piston located in said space; the rod ofsaid piston connected adjustably with said bed with the purpose ofadjusting the position of said frame for height with relation to saidbed.

1. A high-speed hammer comprising: a bed; a frame mounted on said bedwith a provision for vertical motion and consisting of an anvil blockand a crosshead connected to each other; working tools secured,respectively, on said anvil block and crosshead; a power unit mounted onsaid frame and intended to move said working tools towards each otherduring the working stroke; a space in said anvil block filled withhigh-pressure gas for returning the frame to the initial position afterthe working stroke; a piston located in said space; the rod of saidpiston connected adjustably with said bed with the purpose of adjustingthe position of said frame for height with relation to said bed.